constantly calls - this is a form o harassment - make them stop

no response when i answered-

no response when we answered.

Called my home phone at 8:27 PM. Recorded message said to press 1 to refinance my mortgage. I did not press any buttons. After a few more seconds the call disconnected.

ID just says  "incoming call", and the number.  Same as Mike above.  
Message said, push 9 if you have no interest, push 1 to transfer to renegotiate home loan, under civil code 2981.  It even gave a reference number,   7489632.  Anyone else out there get the same reference #?  
I don't have a home loan.  Same old phishing scam,  new phone number.  How can we stop all these calls!?